It depends on what you use to send your e-mail. If you are using software, like Outlook Express, you can open the sent message from your sent items and go to Actions | Resend.
Most browser-based e-mail viewers do not have this option.
1. You had your email settings changed to not place a copy in the sent folder.2. You have moved the copy from the sent folder elsewhere.3. You have deleted the copy from the sent folder.4. You sent...
click on the message in the sent folder and pull it up. From there you can hit write then copy and paste or hit forward and add the addressee and resend it.
The only way to get an answer via email is if the recipient hits Reply, composes a response and hits send!! However, most email clients do offer a way to know when the message was received (and even...